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A.. MOORE.

ROLLER MILL.

10.466,251. PatentedDec.29,1891.

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A. MOORE." ROLLER MILL.

No.l 466,251. Patented Deo. 29, 189,1.

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A.. MOORE. A RULLBB. MILL. bla-466,251. Patented Dec. 29, 1891.

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A. MOORE. `ROLLER MILL. No. 466,251. Pat-emga Deo. 29, 1891.

UNITED STATES vPATENT OFFICE.

ARTHUR MOORE, OF TORONTO, CANADA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 466,251, dated December29, 1891.

Application inea April 24, 1890.

To @ZZ whom it may concern:

shall be evenly distributed over the full length of the roll, and,thirdly to arrange a ropedrive so as to operate satisfactorily to drive'the fast roll and to brake the slow roll with the least possibletension on the rope; and it consists in thepecnliar construction,arrangement, and combinations of parts hereinafter more particularlydescribed, and then definitely pointed out in the claims.

Figure 1 is a perspective view of my improved roller-mill broken away inparts to expose its interior construction and omitting the driving ropeand pulleys. Figs. 2 and 3 are enlarged sectional details showing myimproved means for adjusting and holding the bearing-boxes of the roll.Figli is a cross' section showing the parts of the feed in which myimprovements are involved. Fig. 5 is a side view-showing my improvedropedrive.

As both pairs of rollsare arranged in the same Way,it will be sufficientfor the purpose of the first portion of this specification to describethe mechanical parts connectedv with one pair of rolls, which, it willbe seen, are so arranged that the members of each pair areset one abovethe other.

A is the upper or fast roll, suitably journaled in a bearing-box B,having a cap B.

C is the lower or slow roll, suitably journaled in bearing-box D.

E isa wedge-shaped block placed between the bearing-boxes B and D, thebottom ofthe bearing-box B being beveled to correspond and rest againstthe taper of the block E.

Fis a spindle connected with the top of the boX B and extending throughthe cap G, which -is bolted to the top of the housing H.

serial No. 349,367. (No model.)

A coliar l is loosely fitted onto the spindle F and is provided with ahandle J. The bottom surface of the collar I is inclined or cam` shapedandcorresponds inversely in shape with the stationary hub K, cast uponorfixed to the cap G. l

L is a powerful spring placed on the spindle F'between the bearing-box Band the cap G, the said spring being designed to give the necessaryelastic pressure against the top roll A.

Acorresponding spindle and the parts described are provided for each endof each top roll. lVhen it is necessary to raise the top roll clear ofits mate, the handle J is moved. so as to force the collar l up to theinclined surface formed on the hub K.

.By placing the wedge-shaped block E between the bearings of the upperand lower rolls the pressure directed onto the top of the upper roll isconveyed with equal force onto the bearings of the lower roll, bothrolls being thus held with absolute rigidity, which effectually preventsthe vibratory or chattering motion of either of the rolls, thus insuringan even and regular grind.

Owing to the wedge-shaped block E and the means provided for adjustingit, it will beseen that the distance between the rolls may be instantlyadjusted lto the greatest nicety.

On reference to Figs. 2 and 3 it will be observed that each bearing-boxis provided with va cap or block M, fitted onto the spindle of the rolland made so that its bottom will not come in contact with, the top ofits bearingbox. This cap or block is supported by screwbolts N, whichare adj usted so as to allow the said cap or block to be held againstthe spindle of the roll by the pressure directed by the pinch-screws O.lThis arrangement provides easy means for adjusting ther cap or block togive the necessary pressureagainstthe bearin gs. In order to prevent anylateral movement of the bearing-box B, which must be capable of movingvertically while the ma? chine is in operation, l provide a check-blockP, which is adjusted against the side of the box B by means of thepinch-bolts Q and screw-bolts R.

With a view of providing easy means for IOO e teaser the removal of therolls I bolt the outside housing II to the frame of the machine. It istherefore merely necessary to remove the bolts S, raise the cap G, andremove the spindle F, when the said honsin g may be removed.

On reference to Figs. 4l and i my improvement in the feed will be seen.The feedboard T is supported in such a way that it may be movedhorizontally. Sometimes it is necessary to impart a vibratory sidemovement to this feed-board and sometimes a vibratory end motion must begiven to it. In the drawings I show mechanism for imparting both ofthese movements; but it will of course be understood that only onemovement at a time will be used. In order to give the cud vibratorymovement, I connect the feedboard T by spring-rods U to eccentrics V,fixed to the shaft YV, which derives a rotary motion from someconvenient moving part of the machine. In order to give the sidevibratory motion to the feed-board T, I provide a pin on the bottom ofthe said feed-board T, which 'fits between two cam-shaped blocks X,fixed to the shaft Y, which derives a revolving motion from one of therolls A, as indicated in Fig. 1. Z is a board provided with arms ct,having a series of notches made ou their bottom edges, the said notchesbeing designed to fit over the catches b, which are fixed to astationary part of the machine. By means of these notches the board Zmay be moved nearer to or farther from the edge of the feedboard T. Thefarther the board Z is moved from the edge of the feed-board T thelighter will the said board Z rest upon the feed-board T, and the nearerthe stop-board Z is moved to the edge of the feed-board T the heavierwill be the pressure of the said board Z on the said feed-board T.Bythus ad; nsti ng thestopboard Z the resistance which it will offer tothe stream of grain may be increased or decreased, as desired, to spreadthe grain in accordance with the judgment of the miller.

On reference to Fig. 5 my improved system of rope-drive will be seen. Inthis figure I show the rope-drive on'one side of the machine, theduplicate pair of rolls being similarly driven on the opposite side, therope on that side being shown in dotted lines to prevent confusing itwith the rope ou the near Side. In this figure I show the maindrivingwheel G, which is not shown in the other figures of the drawings,as it is usually placed below the fiooron which the machine stands. Iewill assume that this pulley is revolving in the direction indicated byarrow, in which case the rope d will travel in the direction indicatedbyarrow, which directs it to a pulley f, fixed to the axle of the lowerslow-roll C. After passing around this pulley, which revolves asindicated by arrow, the rope d passes down around the idler orguiding-pulley e, thence up and around a small pulley g, fixed to theshaft of the fast roll A, and thence back to the main driving-pulley G.It

willbe observed that this single rope drives the slow roll C on one pairand the fast roll A on the other pair of rolls, and the correspondingrope on the other side drives the other or duplicate pair of rolls notdriven from the side shown in the drawings, so that both top rolls Arevolve fast, while the bottom rolls C revolve slowly. It is of courseunderstood by all millers that the friction of the stock passing betweenthe rolls has a tendency to cause the slowly-revolving roll C to revolveas quickly as its fast-revolving mate. This tendency is checked by thearrangement described of my rope-drive in the following way: As beforestated, the rope d, when it leaves the pulley 6, passes around thepulley connected to the slow roll C. Consequently the portion of therope extending between the pulley G and the pulley ou the roll C shouldbe the loose side of the rope-drive; but the fast roll A, running inconnection with the roll C, now referred to, forces the roll C beyondits proper speed, the portion of the rope extending between the pulley(i and the pulleyon the roll C is tightened and acts as a brake to holdback the speed of the roll C, which is thus kept at its regular speedcalled for by the size of the pulley.

A result of my system of drive is an absence of friction on the guide ortightening pulley and a consequent or corresponding saving of power, asthe rope both going from and returning tothe driving-pulley is tight-71.6.,working--or both sides are working sides. The rope is slack bothgoing onto and coming off the guide-pulley.

Vhat I claim as my invention isl. In a roller-mill, and in combinationwith the housings thereof, the bearing-box B, fitted between thehousings, a check-block I), grooved on one side and embracing one sideof the box and adjnstably secured in place by the pinch-bolt Q, pressingagainst the back of the check-block, and screw-bolts R, passing throughboth check-block and housing, substantially as described and shown.

2. In a roller-mill, the combination of the box B, a cap B', boltedthereto, the block M, set in the box, the bolts N,set into said block M,and the pinch-screws O, passing through the cap B' and bearing againstthe block M, substantially as shown and described.

In a roller-mill, the-combination, with the two pairs of rolls, themembers of each pair being arranged one above the other, of two sets ofdrivers, as the rope d, each passing from the drive-wheel G up betweentwo pnlleys of different sizes, around the larger one and down to anidler or guide, thence up to and around the small pulley, and down againbetween the large and small pulleys to the driving-wheel, substantiallyas described.

Toronto, March 24, 1890.

ARTHUR MOORE.

' In presence ofy CHARLES C. BALDWIN,

J. E. CAMERON.

IIO

